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Finding the Fourth Proportional to 14,975.40, 20,665.95 and 8,260.89

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Solution

The fourth proportional to 14,975.40, 20,665.95 and 8,260.89 is: 11,399.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,975.40 : 20,665.95 = 8,260.89 : x
  2. Step 2: Convert to fraction form
    14,975.40/20,665.95 = 8,260.89/x
  3. Step 3: Cross multiply
    14,975.40x = 20,665.95 × 8,260.89
  4. Step 4: Simplify right side
    14,975.40x = 170,719,077.69
  5. Step 5: Solve for x
    x = 170,719,077.69/14,975.40
  6. Step 6: Final answer
    x = 11,399.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.